initial commit / add all books

13 files changed, 265 insertions, 0 deletions

diff --git a/3784/CH2/EX2.1/Ex2_1.sce b/3784/CH2/EX2.1/Ex2_1.sce
new file mode 100644
index 000000000..f6a4828be
--- /dev/null
+++ b/3784/CH2/EX2.1/Ex2_1.sce
@@ -0,0 +1,34 @@
+clc

+//variable initialisation

+a1=0//Initial Firing Angle of Converter

+Vl=460//Line to Line Voltage in Volts

+Ia=170//armature Current in Ampere

+Ra=0.0999//Armature Resistance in ohm

+K=0.33

+a2=30

+N1=1750//Rotor Speed in rpm

+

+//solution

+Vm=(sqrt(2)/sqrt(3))*Vl

+Va=(3*sqrt(3)/%pi)*Vm*cosd(a1)

+Ia1=17

+Eb1=Va-(Ia1*Ra)

+N0=Eb1/K//no load Speed in rpm

+Va2=Va*cosd(a2)//For alpha=30

+Eb2=Va2-(Ia1*Ra)

+N01=Eb2/K//No load speed at alpha=30

+Eb3=K*N1//For Full load Condition

+Va3=Eb3+(Ia*Ra)

+a3=acosd(Va3/Va)

+P=Va3*Ia

+Irms=Ia*sqrt(((180-a3)/180))

+Vph=Vl/sqrt(3)

+pf=P/(3*Vph*Irms)//Power Factor

+Eb4=Va3-(Ia1*Ra)

+N4=Eb4/K

+R=(N4-N1)*100/N1//Speed Regulation

+printf('\n\n No load speed at alpha 0=%0.1f rpm\n\n',N0)

+printf('\n\n No load speed at alpha 30=%0.1f rpm\n\n',N01)

+printf('\n\n The Firing Angle for rated speed=%0.1f\n\n',a3)

+printf('\n\n Power Factor at rated speed=%0.1f\n\n',pf)

+printf('\n\n Speed Regulation=%0.1f\n\n',R)

diff --git a/3784/CH2/EX2.10/Ex2_10.sce b/3784/CH2/EX2.10/Ex2_10.sce
new file mode 100644
index 000000000..0f0243c31
--- /dev/null
+++ b/3784/CH2/EX2.10/Ex2_10.sce
@@ -0,0 +1,17 @@
+clc 

+//variable initialization

+P=80e+3 //power in Watt

+Va1=440 //voltage in volts

+N1=800 //speed in rpm

+N2=600 //speed in rpm

+Eb1=410 //Given back emf in volts

+Vrms=415 //voltage in volts

+

+//solution

+Eb2=Eb1*(N2/N1)

+Ia1=P/Va1

+Ra=(Va1-Eb1)/Ia1

+Ia2=0.75*Ia1//As motor is operating at 75% of rated torque

+Va2=Eb2+(Ia2*Ra)

+a=acosd(Va2*%pi/(3*sqrt(2)*Vrms))

+printf('\n\n The Triggering Angle=%0.1f\n\n',a)

diff --git a/3784/CH2/EX2.11/Ex2_11.sce b/3784/CH2/EX2.11/Ex2_11.sce
new file mode 100644
index 000000000..f11d443e2
--- /dev/null
+++ b/3784/CH2/EX2.11/Ex2_11.sce
@@ -0,0 +1,18 @@
+clc 

+//variable initialization

+P=100e+3 //power in W

+Va1=440 //Supply voltage in volts

+N1=1000 //speed in rpm

+N2=800 //speed in rpm

+Eb1=410 //given Back EMF in volts

+Vrms=415 //RMS voltage in volts

+f=50 //Supply frequency in Hz

+

+//solution

+Eb2=Eb1*(N2/N1)

+Ia1=P/Va1

+Ra=(Va1-Eb1)/Ia1

+Ia2=0.75*Ia1//At 75% of rated torque

+Va2=Eb2+(Ia2*Ra)

+a=acosd((Va2*%pi)/(3*sqrt(2)*Vrms))

+printf('\n\n The Firing Angle=%0.1f\n\n',a)

diff --git a/3784/CH2/EX2.12/Ex2_12.sce b/3784/CH2/EX2.12/Ex2_12.sce
new file mode 100644
index 000000000..87c682161
--- /dev/null
+++ b/3784/CH2/EX2.12/Ex2_12.sce
@@ -0,0 +1,21 @@
+clc 

+//variable initialization

+Php=100 //power in hp

+P=Php*735.5 //power in Watts

+Va1=440 //voltage in volts

+N1=1000 //speed in rpm

+N2=500 //speed in rpm

+Eb1=430//Given back EMF in volts

+Vrms=415 //RMS voltage in volts

+

+//solution

+Eb2=Eb1*(N2/N1)

+Ia1=P/Va1

+Ra=10/Ia1

+Ia2=0.85*Ia1

+Va2=Eb2+Ia2*Ra//At 85% load and 500 rpm

+a=acosd(Va2/(1.35*Vrms))

+printf('\n\n The Firing Angle=%0.1f\n\n',a)

+

+

+ 

diff --git a/3784/CH2/EX2.13/Ex2_13.sce b/3784/CH2/EX2.13/Ex2_13.sce
new file mode 100644
index 000000000..82e87d517
--- /dev/null
+++ b/3784/CH2/EX2.13/Ex2_13.sce
@@ -0,0 +1,13 @@
+clc 

+//variable initialisation

+Va=230 //Supply voltage in volts

+N1=1400 //speed in rpm

+N2=600 //speed in rpm

+N3=1400 //speed in rpm

+Vdrop=15//Voltage drop in Volts

+//solution

+Eb1=Va-15

+Eb2=Eb1*(N2/N1)

+Va1=Eb2+Vdrop

+a2=acosd(Va1/Va)

+printf('\n\n The Firing Angle=%0.1f\n\n',a2)

diff --git a/3784/CH2/EX2.2/Ex2_2.sce b/3784/CH2/EX2.2/Ex2_2.sce
new file mode 100644
index 000000000..dcb84cf45
--- /dev/null
+++ b/3784/CH2/EX2.2/Ex2_2.sce
@@ -0,0 +1,36 @@
+clc

+//variable initialisation

+a1=0//Initial Firing Angle of Converter

+Vl=460//Line to Line Voltage in Volts

+Ia=150//armature Current in Ampere

+Ra=0.0999//Armature Resistance in ohm

+K=0.33

+N1=1650//Rotor Speed in rpm

+Ia1=15//armature Current for 2nd case in Ampere

+//solution

+Vm=(sqrt(2)/sqrt(3))*Vl

+Va=(3*sqrt(3)/%pi)*Vm*cosd(a1)

+Eb1=Va-(Ia*Ra)

+N0=Eb1/K//no load Speed in rpm

+a2=45

+Va2=Va*cosd(a2)

+Eb2=Va2-(Ia*Ra)

+N01=Eb2/K//No load speed at alpha=30

+Eb3=K*N1

+Va3=Eb3+(Ia*Ra)

+a3=acosd(Va3/Va)

+Irms=Ia*sqrt((180-a3)/180)

+P1=3*(Vl/sqrt(3))*Irms//Supply VA

+P=Va3*Ia//Power input to motor

+Pa=Va3*Ia

+pf=Pa/P//Power Factor

+Eb4=Va3-(Ia1*Ra)

+N4=Eb4/K

+R=(N4-N1)*100/N1//Speed Regulation

+printf('\n\n No load speed at alpha 0=%0.1f rpm\n\n',N0)

+printf('\n\n No load speed at alpha 45=%0.1f rpm\n\n',N01)

+printf('\n\n The Firing Angle for rated speed=%0.1f\n\n',a3)

+printf('\n\n Supply Power at rated speed=%0.1f watts\n\n',P)

+printf('\n\n Power Factor at rated speed=%0.1f\n\n',pf)

+printf('\n\n Speed Regulation=%0.1f\n\n',R)

+//The answers vary due to round off error

diff --git a/3784/CH2/EX2.3/Ex2_3.sce b/3784/CH2/EX2.3/Ex2_3.sce
new file mode 100644
index 000000000..614de9609
--- /dev/null
+++ b/3784/CH2/EX2.3/Ex2_3.sce
@@ -0,0 +1,25 @@
+clc

+//variable initialisation

+Va=220 //supply voltage in volts

+N1=1500 //speed in rpm

+I=50 // current in ampere

+Ra=0.5 //armature resistance in ohm

+Vl=440 //line voltage in volts

+f=50 //frequency in Hz

+N2=1200 //speed in rpm

+

+//solution

+Vm=(Va*%pi)/(3*sqrt(3))

+Vph=(Vl*(sqrt(2)))/(sqrt(3))

+Xmer_ratio=Vph/Vm

+Eb1=Va-(Ra*I)

+Eb2=(N2/N1)*Eb1

+Va=Eb2+Ra*I

+a=acosd((Va*%pi)/(3*sqrt(3)*Vm))

+N3=800

+Eb3=(-N3/N1)*Eb1

+Va1=Eb3+(2*I*Ra)

+a1=acosd((Va1*%pi)/(3*sqrt(3)*Vm))

+printf('\n\n Transformer Turns Ratio=%0.1f\n\n',Xmer_ratio)

+printf('\n\n The Firing Angle=%0.1f\n\n',a)

+printf('\n\n The Firing Angle=%0.1f\n\n',a1)

diff --git a/3784/CH2/EX2.4/Ex2_4.sce b/3784/CH2/EX2.4/Ex2_4.sce
new file mode 100644
index 000000000..f037999b6
--- /dev/null
+++ b/3784/CH2/EX2.4/Ex2_4.sce
@@ -0,0 +1,12 @@
+clc

+//variable initialisation

+Va=220 //supply voltage in volts

+N1=1500 //speed in rpm

+Ra=2 //armature resistance in ohm

+La=0.02836 //armature inductance in mH

+f=50 //frequency in Hz

+

+//solution

+Vl=(Va*%pi)/(3*sqrt(2))

+Vm=sqrt(2)*Vl

+printf('\n\n The Source Voltage Required=%0.1f Volts\n\n',Vm)

diff --git a/3784/CH2/EX2.5/Ex2_5.sce b/3784/CH2/EX2.5/Ex2_5.sce
new file mode 100644
index 000000000..62786d27b
--- /dev/null
+++ b/3784/CH2/EX2.5/Ex2_5.sce
@@ -0,0 +1,14 @@
+clc

+//variable initialisation

+V1=450 //terminal voltage in volts

+Vd=30 //voltage drop in volts

+V2=420 //input supply in volts

+f=50 //frequency in Hz

+a1=0//Firing Angle of Converter

+//solution

+Vt=V1+Vd

+V0_0=(3*sqrt(2))/(%pi)

+V0_a=480

+

+a2=acosd(V0_a/(V0_0*V2))

+printf('\n\n The Firing Angle=%0.1f\n\n',a2)

diff --git a/3784/CH2/EX2.6/Ex2_6.sce b/3784/CH2/EX2.6/Ex2_6.sce
new file mode 100644
index 000000000..bbcd32c94
--- /dev/null
+++ b/3784/CH2/EX2.6/Ex2_6.sce
@@ -0,0 +1,16 @@
+clc

+//variable initialization

+N=800 //speed in rpm

+P=80000 //power in kw

+V=440 //Supply voltage in volts

+f=50 //Supply frequency in Hz

+Ra=0.8 //armature resistance in ohm

+k=0.2 //machine constant in V/rpm

+Ia=160 //rated current in ampere

+

+//solution

+Vp=V/(sqrt(3))//Phase Voltage

+Eb=k*N//Back emf in Volts

+V2=Eb+(Ia*Ra)

+a=acosd((V2*%pi)/(3*sqrt(6)*Vp))

+printf('\n\n The Firing Angle=%0.1f\n\n',a)

diff --git a/3784/CH2/EX2.7/Ex2_7.sce b/3784/CH2/EX2.7/Ex2_7.sce
new file mode 100644
index 000000000..a58f9b693
--- /dev/null
+++ b/3784/CH2/EX2.7/Ex2_7.sce
@@ -0,0 +1,15 @@
+clc 

+//variable initialisation

+N=900 //speed in rpm

+V=430 //Supply voltage in volts

+Ia=20 //current in ampere

+N1=900 //speed in rpm  

+N2=450 //speed in rpm

+Ra=0.2 //armature resistance in ohm

+

+//solution

+Vl=V/1.35

+V2=((V-(Ia*Ra))/2)+Ia*Ra

+a=acosd(V2/V)

+printf('\n\n The RMS Voltage per phase=%0.1f Volts\n\n',V2)

+printf('\n\n The Firing Angle=%0.1f\n\n',a)

diff --git a/3784/CH2/EX2.8/Ex2_8.sce b/3784/CH2/EX2.8/Ex2_8.sce
new file mode 100644
index 000000000..9765dc21a
--- /dev/null
+++ b/3784/CH2/EX2.8/Ex2_8.sce
@@ -0,0 +1,31 @@
+clc

+//Variable Initialisation

+Vs=220//Supply Voltage in Volts

+N=600//Rotor Speed in rpm

+Ra=0.4//Armature Resistance in ohm

+Rf=150//Field Resistance in ohm

+af=0//Firing Angle for Maximum field current

+aa=0//Firing Angle for maximum Armature current

+N2=1200//Speed in rpm

+T=120//Torque in N-m

+K=1.4//Motor voltage Constant

+//Solution

+Vm=Vs/sqrt(3)

+W=2*%pi*N/60

+Vf1=3*sqrt(3)*sqrt(2)*Vm*cosd(af)/%pi

+If1=Vf1/Rf//Field Current in Amp

+Ia1=T/(K*If1)

+Eb1=K*If1*W

+Va1=Eb1+(Ia1*Ra)

+aa1=acosd(Va1*%pi/(3*sqrt(3)*sqrt(2)*Vm))

+Va2=3*sqrt(3)*sqrt(2)*Vm*cosd(aa)/%pi

+Eb2=Va2-(Ia1*Ra)

+N3=Eb2/(K*If1)//Speed in rad/s

+N3rpm=N3*60/(2*%pi)//Speed in Rpm

+W2=N2*2*%pi/60

+If2=Eb2/(K*W2)

+Vf2=If2*Rf

+af1=acosd(Vf2*%pi/(3*sqrt(3)*sqrt(2)*Vm))

+printf('\n\n The Firing Angle=%0.1f\n\n',aa1)

+printf('\n\n The Field Current=%0.1f Amp\n\n',N3rpm)

+printf('\n\n The Field Current=%0.1f Amp\n\n',af1)

diff --git a/3784/CH2/EX2.9/Ex2_9.sce b/3784/CH2/EX2.9/Ex2_9.sce
new file mode 100644
index 000000000..aff594e50
--- /dev/null
+++ b/3784/CH2/EX2.9/Ex2_9.sce
@@ -0,0 +1,13 @@
+clc 

+//variable initialisation

+V=440 //voltage in volts

+P=100e+3 //power in Watts

+N=900 //speed in rpm

+V1=415 //supply voltage in volts

+

+//solution

+k=(3*sqrt(2))/%pi

+a=acosd(V/(k*V1))

+V2=0.5*V//At 50% of rated speed

+a1=acosd(V2/(k*V1))

+printf('\n\n The Firing Angle=%0.1f\n\n',a1)